Management system and management method of mining machine

ABSTRACT

A management system of a mining machine includes a vehicle, a first antenna, in the vehicle, receiving radio waves from GPS satellites, a portable second antenna, in a releasable manner in the vehicle, receiving radio waves from the GPS satellites, a first detector, in the vehicle, detecting a position of the first antenna based on a signal from the first antenna, a second detector, in the vehicle, detecting a position of the second antenna based on a signal from the second antenna, and a processer setting a prohibited area where an entry of a mining machine is prohibited based on detection results of the first and second detectors, such that the prohibited area includes the positions of the first and second antennae.

FIELD

The present invention relates to a management system and a management method of a mining machine.

BACKGROUND

Mining machines such as an excavator and a dump truck operate at a working of a mine. Moreover, a worker works at the mine. Patent Literature 1 discloses a technology related to a site monitoring system for the purpose of securing the safety of a worker.

CITATION LIST Patent Literature

Patent Literature 1: Japanese Laid-open Patent Publication No. 2010-117882

SUMMARY Technical Problem

When a worker works at a mine, if the operation of a mining machine is stopped to secure safety, productivity at the mine may be reduced. Moreover, when equipment different from the mining machine operates at the mine, if the operation of the mining machine is stopped, productivity at the mine may be reduced.

An object of the present invention is to provide a management system and a management method of a mining machine, which can suppress a reduction in productivity at a mine.

Solution to Problem

According to the present invention, a management system of a mining machine comprises: a vehicle able to run at a mine; a first antenna, placed in the vehicle, configured to receive radio waves from GPS satellites; a portable second antenna, mounted in a releasable manner in the vehicle, configured to receive radio waves from the GPS satellites; a first detection device, placed in the vehicle, configured to detect a position of the first antenna based on a signal from the first antenna; a second detection device configured to detect a position of the second antenna based on a signal from the second antenna; and a processing device configured to set a prohibited area where an entry of a mining machine able to run at the mine is prohibited based on a detection result of the first detection device and a detection result of the second detection device, such that the prohibited area includes the position of the first antenna and the position of the second antenna.

In the present invention, the second detection device can be placed in the vehicle, and the second antenna can be configured to receive radio waves from the GPS satellites in a state of being placed outside the vehicle.

In the present invention, the second antenna can be an antenna carried by a worker manning the vehicle.

The management system of a mining machine can further comprise an operating unit, placed in the vehicle, configured to allow an input of a signal into the processing device, and the operating unit can be operated to perform at least one of the setting of the prohibited area including the position of the second antenna and a cancellation of the setting.

In the present invention, the mining machine is operated on at least a part of a load site, a dump site, and a haul road leading to at least one of the load site and the dump site at the mine, and the prohibited area including the position of the first antenna is continued to be set during the operation of the mining machine.

In the present invention, the prohibited area can be one area including both the position of the first antenna and the position of the second antenna.

In the present invention, the processing device can be configured to change a size of the prohibited area based on a relative position between the first antenna and the second antenna.

In the present invention, the prohibited area can include a first prohibited area including the position of the first antenna, and a second prohibited area that is set away from the first prohibited area and includes the position of the second antenna.

The management system of a mining machine can further comprise a communication system configured to transmit an instruction signal to the mining machine to prevent the mining machine from entering the prohibited area.

In the present invention, the communication system can include a first communication device, mounted in the vehicle, configured to allow a transmission of information based on signals respectively from the first and second antennas.

In the present invention, the information based on the signals can include information on the position of the first antenna detected by the first detection device, and information on the position of the second antenna detected by the second detection device.

The management system of a mining machine can further comprise a control facility including the processing device, wherein the processing device of the control facility can be configured to set the prohibited area based on the information based on the signals from the first communication device, the communication system can include a second communication device placed in the control facility and a third communication device placed in the mining machine, and the instruction signal can be transmitted from the second communication device to the third communication device.

According to the present invention, a management system of a mining machine, including a central control apparatus placed in a control facility, the management system comprises: a vehicle able to run at a mine; a first antenna, placed in the vehicle, configured to receive radio waves from GPS satellites; a portable second antenna, mounted in a releasable manner in the vehicle, configured to receive radio waves from the GPS satellites in a state of being carried by a worker manning the vehicle outside the vehicle; a first detection device, placed in the vehicle, configured to detect a position of the first antenna based on a signal from the first antenna; a second detection device, placed in the vehicle, configured to detect a position of the second antenna based on a signal from the second antenna; a processing device, provided in the central control apparatus, configured to set a prohibited area where an entry of a mining machine able to run at the mine is prohibited, based on a detection result of the first detection device and a detection result of the second detection device, such that the prohibited area includes the position of the first antenna and the position of the second antenna, and set a travel condition of the mining machine to stop a travel of the mining machine before the prohibited area; and a communication system configured to transmit to the mining machine information on the travel condition set by the processing device, wherein the mining machine is configured to run at the mine in accordance with the information on the travel condition transmitted from the central control apparatus by the communication system.

According to the present invention, a management method of a mining machine comprises: receiving radio waves from GPS satellites with a first antenna placed in a vehicle able to run at a mine; receiving radio waves from the GPS satellites with a portable second antenna mounted in a releasable manner in the vehicle; detecting a position of the first antenna based on a signal from the first antenna; detecting a position of the second antenna based on a signal from the second antenna; and setting a prohibited area where an entry of a mining machine able to run at the mine is prohibited based on results of the detection, such that the prohibited area includes the position of the first antenna and the position of the second antenna.

According to the present invention, a management method of a mining machine, using a central control apparatus placed in a control facility, the management method comprises: causing a processing device provided in the central control apparatus to receive radio waves from GPS satellites with a first antenna placed in a vehicle able to run at a mine, receive radio waves from the GPS satellites with a second antenna that is mounted in a releasable manner in the vehicle and carried by a worker manning the vehicle outside the vehicle, detect a position of the first antenna based on a signal from the first antenna, detect a position of the second antenna based on a signal from the second antenna, and set a prohibited area where an entry of a mining machine able to run at the mine is prohibited based on results of the detection, such that the prohibited area includes the position of the first antenna and the position of the second antenna, and set a travel condition of the mining machine to stop a travel of the mining machine before the prohibited area; transmit to the mining machine information on the travel condition set by the processing device; and cause the mining machine to run in accordance with the information on the travel condition transmitted from the central control apparatus.

According to the present invention, a reduction in productivity at a mine is suppressed.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram illustrating an example of a management system of a mining machine according to the embodiment.

FIG. 2 is a diagram illustrating an example of a control apparatus according to the embodiment.

FIG. 3 is a diagram illustrating an example of a dump truck according to the embodiment.

FIG. 4 is a diagram illustrating an example of a control system of the dump truck according to the embodiment.

FIG. 5 is a diagram illustrating an example of a vehicle according to the embodiment.

FIG. 6 is a diagram illustrating an example of a control system of the vehicle according to the embodiment.

FIG. 7 is a diagram illustrating an example of the method of use of a landmark according to the embodiment.

FIG. 8 is a flowchart illustrating an example of a traveling method of the dump truck according to the embodiment.

FIG. 9 is a schematic diagram illustrating an example of a position detection process and a position registration process of the landmark according to the embodiment.

FIG. 10 is a flowchart illustrating an example of the position detection process and the position registration process of the landmark according to the embodiment.

FIG. 11 is a diagram illustrating an example of a prohibited area according to the embodiment.

FIG. 12 is a diagram illustrating an example of the prohibited area according to the embodiment.

FIG. 13 is a diagram illustrating an example of the prohibited area according to the embodiment.

FIG. 14 is a diagram illustrating an example of the prohibited area according to the embodiment.

FIG. 15 is a diagram illustrating an example of the prohibited area according to the embodiment.

DESCRIPTION OF EMBODIMENTS

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiment.

<Outline of Management System of Mining Machine>

FIG. 1 is a diagram illustrating an example of a management system 1 of a mining machine according to the embodiment. FIG. 1 schematically illustrates the management system 1 and sites where the management system 1 is applied.

The management system 1 includes a control apparatus 10 placed in a control facility 7, and manages mining machines. The management of mining machines includes at least one of operations control of mining machines, the evaluation of productivity of the mining machines, the evaluation of operation skill of the mining machine operators, the maintenance of the mining machines, and the abnormality diagnosis of the mining machines.

The mining machine is a generic name of machinery used for various operations at a mine. Mining machines include at least one of a boring machine, an excavating machine, a loading machine, and a transport machine. The excavating machines can excavate a mine. The loading machines can load the transport machine. The loading machines include at least one of an excavator, an electric shovel, and a wheel loader. The transport machine includes a moving body that can move at a mine, and can transport a load. The transport machines include a dump truck. The load includes at least either earth and sand or ores produced by excavation.

In the embodiment, the management system 1 manages the transport machines that can run at a mine. In the embodiment, a description will be given of an example where the management system 1 manages a dump truck 2. The dump truck 2 operates on at least parts of a load site LPA, a dump site DPA, and a haul road HL that leads to at least one of the load site LPA and the dump site DPA at the mine. The dump truck 2 is a moving body that can move at the mine. The dump truck 2 can run on at least parts of the load site LPA, the dump site DPA, and the haul road HL. The dump truck 2 can move between the load site LPA and the dump site DPA, running along the haul road HL.

The dump truck 2 is loaded with a load at the load site LPA. The load site LPA is an area (place) where at the mine the loading operation of a load is performed. The dump truck 2 is loaded with the load at a loading position LP at the load site LPA. The loading position LP is a position (loading point) where at the load site LPA a load loading operation is performed. The loading operation is an operation to load the dump truck 2 with a load. A loading machine 4 loads the dump truck 2 at the load site LPA. The loading machine 4 loads the dump truck 2 situated at the loading position LP.

The dump truck 2 unloads (deposits) the load at the dump site DPA. The dump site DPA is an area (place) where at the mine a load deposit operation is performed. The dump truck 2 deposits the load at a dumping position DP at the dump site DPA. The deposit operation is an operation to unload (deposit) a load from the dump truck 2. The load is deposited from the dump truck 2 at the dump site DPA. The dump truck 2 is situated at the dumping position DP and deposits the load.

In the embodiment, the dump truck 2 is what is called a driverless dump truck that operates by an instruction signal from the control apparatus 10. A worker (driver) does not ride in the dump truck 2.

In FIG. 1, the management system 1 includes a vehicle 3 that can run at a mine, the control apparatus 10 that is placed in the control facility 7 and controls the dump truck 2, landmarks 8 installed at the mine, a communication system 9 that can convey information.

The vehicle 3 is a moving body that can move at the mine. The vehicle 3 can run on at least parts of the load site LPA, the dump site DPA, and the haul road HL. A worker (driver) rides in the vehicle 3. In other words, the vehicle 3 is what is called a manned vehicle. The vehicle 3 runs at the mine to carry out various operations related to the mine including the management and maintenance of the mining machines. The worker rides in the vehicle 3 and moves to any given position (place) at the mine.

The control apparatus 10 is installed in the control facility 7 at the mine. The control facility 7 may be referred to as the control facility 7 or the central control room 7. The control apparatus 10 may be referred to as the control apparatus (central control apparatus 10 or the central control system 10. The control apparatus 10 does not move but may be movable.

A plurality of the landmarks 8 is installed at the mine. The landmarks 8 are respectively placed at the load site LPA, the dump site DPA, and the haul road HL. The landmark 8 is a stationary object. The landmark 8 does not move from its installed position (place). The management system 1 uses the landmark 8 to correct the position of the dump truck 2. In the embodiment, the dump truck 2 runs along a created travel route. When the dump truck 2 runs off the travel route, the management system 1 corrects the position of the dump truck 2 using the landmark 8 so sis to cause the dump truck 2 to run along the travel route.

The communication system 9 conveys information between the vehicle 3, the control apparatus 10, and the dump truck 2. The control apparatus 10 and the dump truck 2 can communicate with each other via the communication system 9. The control apparatus 10 and the vehicle 3 can communicate with each other via the communication system 9. The dump truck 2 and the vehicle 3 can communicate with each other via the communication system 9. In the embodiment, the communication system 9 includes a wireless communication system. The vehicle 3, the control apparatus 10, and the dump truck 2 can wirelessly communicate with each other via the communication system 9. In the embodiment, the communication system 9 includes a relay 6 that relays a signal (radio wave) between the vehicle 3, the control apparatus 10, and the dump truck 2.

In the embodiment, the position of the dump truck 2, the position of the vehicle 3, and the position of the landmark 8 are detected using the global positioning system (Global Positioning System: GPS). GPS includes GPS satellites 5. GPS detects a position in the coordinate system (GPS coordinate system) that defines latitude, longitude, and altitude. The position detected by GPS includes coordinate data of latitude, longitude, and altitude. The positions of the dump truck 2, the vehicle 3, and the landmark 8 at the mine are detected by GPS. The position detected by GPS is an absolute position defined in the GPS coordinate system. In the following description, the position detected by GPS is referred to as the GPS position as appropriate. The GPS position is an absolute position. The GPS position is coordinate data (coordinate values) of latitude, longitude, and altitude.

<Control Apparatus>

Next, the control apparatus 10 placed in the control facility 7 will be described. FIG. 2 is a block diagram illustrating an example of the control apparatus 10 according to the embodiment. As illustrated in FIGS. 1 and 2, the control apparatus 10 includes a computer system 11, a display device 16, an input device 17, and a wireless communication device 18.

The computer system 11 includes a processing device 12, a storage device 13, and an input/output unit 15. The display device 16, the input device 17, and the wireless communication, device 18 are connected to the computer system 11 via the input/output unit 15. The input/output unit 15 is used for the input/output (interface) of information between the processing device 12 and at least one of the display device 16, the input device 17, and the wireless communication device 18.

The processing device 12 includes a CPU (Central Processing Unit). The processing device 12 executes various processes related to the management of the dump truck 2. The processing device 12 includes a data processing unit 12A, a prohibited area setting unit 12B, and a travel route creation unit 12C. In the embodiment, the data processing unit 12A processes information on the position of the dump truck 2, information on the position of the vehicle 3, and information on the position of the landmark 8, the information having been acquired via the communication system 9. The prohibited area setting unit 12B sets a prohibited area where at the mine the entry of the dump truck 2 is prohibited. The travel route creation unit 12C creates a travel route where the dump truck 2 runs. The dump truck 2 runs along the travel route created by the travel route creation unit 12C on at least parts of the load site LAP, the dump site DPA, and the haul road HL.

The storage device 13 is connected to the processing device 12. The storage device 13 includes at least one of a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, and a hard disk drive. The storage device 13 stores various pieces of information on the management of the dump truck 2. The storage device 13 includes a database 13B where information is registered. The storage device 13 stores a computer program for causing the processing device 12 to execute various processes. The processing device 12 uses the computer program stored in the storage device 13 to process information on the position, set a prohibited area, and create a travel route.

The display device 16 includes a flat panel display such as a liquid crystal display. The display device 16 can display information on the position of the dump truck 2, information on the position of the vehicle 3, and information on the position of the landmark 8.

The input device 17 includes at least one of a keyboard, a touch panel, and a mouse. The input device 17 functions as an operating unit that can input an operation signal into the processing device 12. A controller of the control facility 7 can input an operation signal into the processing device 12 by operating the input device 17.

The communication system 9 includes the wireless communication device 18. The wireless communication device 18 is placed in the control facility 7. The wireless communication device 18 is connected to the processing device 12 via the input/output unit 15. The wireless communication device 18 includes an antenna 18A. The wireless communication device 18 can receive information transmitted from at least one of the dump truck 2 and the vehicle 3. The information received by the wireless communication device 18 is output to the processing device 12. The information received by the wireless communication device 18 is stored (registered) in the storage device 13. The wireless communication device 18 can transmit information to at least one of the dump truck 2 and the vehicle 3.

<Dump Truck>

Next, the dump truck 2 will be described. FIG. 3 is a diagram schematically illustrating the appearance of the dump truck 2 according to the embodiment. FIG. 4 is a control block diagram of the dump truck 2 according to the embodiment.

As illustrated in FIGS. 3 and 4, the dump truck 2 includes a vehicle body 21, a vessel 22, wheels 23, a non-contact sensor 24 that detects the landmark 8 in a non-contact manner, a processing device 20, a storage device 25, a gyro sensor 26, a speed sensor 27, a wireless communication device 28 to which an antenna 28A is connected, and a position detection device 29 to which an antenna 29A is connected.

A drive device is placed in the vehicle body 21. The drive device includes an internal combustion engine such as a diesel engine, a generator operated by the internal combustion engine, and a motor operated by electric power generated by the generator. The motor drives the wheels 23. The wheel 23 includes a tire and a wheel. The wheels 23 rotate with the power transmitted from the drive device of the vehicle body 21. The power of the internal combustion engine may be transmitted to the wheels 23 via a transmission including a torque converter.

The vessel 22 includes a bed where a load is loaded. The vessel 22 is swingably placed on the vehicle body 21. The loading machine 4 loads the vessel 22. The vessel 22 is lifted in the deposit operation to deposit the load.

The non-contact sensor 24 is placed at the front of the vehicle body 21. The non-contact sensor 24 detects the landmark 8 installed at the mine in a non-contact manner. In the embodiment, the non-contact sensor 24 includes a radar. The non-contact sensor 24 emits a radio wave to irradiate the landmark 8 with the radio wave. At least part of the radio wave by which the landmark 8 was irradiated is reflected from the landmark 8. The non-contact sensor 24 receives the radio wave reflected from the landmark 8. Consequently, the non-contact sensor 24 can detect a direction and a distance of the landmark 8 with respect to the non-contact sensor 24. The non-contact sensor 24 detects the relative position between the non-contact sensor 24 and the landmark 8. The non-contact sensor 24 is fixed to the vehicle body 21. The non-contact sensor 24 is connected to the processing device 20. The non-contact sensor 24 outputs a detection signal to the processing device 20. The processing device 20 can obtain the relative position between the dump truck 2 and the landmark 8 based on the detection signal of the non-contact sensor 24. In other words, the non-contact sensor 24 detects the relative position of the landmark 8 with respect to itself and accordingly the relative position between the dump truck 2 and the landmark 8 are detected. Moreover, the non-contact sensor 24 functions as an obstacle detection sensor that detects an obstacle in front of the vehicle body 21.

The gyro sensor 26 detects the direction (amount of directional change) of the dump truck 2. The gyro sensor 26 is connected to the processing device 20. The gyro sensor 26 outputs a detection signal to the processing device 20. The processing device 20 can obtain the direction (amount of directional change) of the dump truck 2 based on the detection signal of the gyro sensor 26.

The speed sensor 27 detects the travel speed of the dump truck 2. In the embodiment, the speed sensor 27 detects the rotational speed of the wheel 23 to detect the speed (travel speed) of the dump truck 2. The speed sensor 27 is connected to the processing device 20. The speed sensor 27 outputs a detection signal to the processing device 20. The processing device 20 can obtain a travel distance of the dump truck 2 based on the detection signal of the speed sensor 27 and time information from a timer built in the processing device 20.

The processing device 20 is mounted in the dump truck 2. The processing device 20 includes a CPU (Central Processing Unit). The processing device 20 executes various processes related to the management of the dump truck 2. The processing device 20 includes a data processing unit, a prohibited area setting unit, and a travel route creation unit, and can execute processes equivalent to those of the processing device 12 placed in the control facility 7. In other words, the data processing unit of the processing device 20 can process information on the position of the dump truck 2, information on the position of the vehicle 3, and information on the position of the landmark 8. The prohibited area setting unit of the processing device 20 can set a prohibited area where at the mine the entry of the dump truck 2 is prohibited. The travel route creation unit of the processing device 20 can create a travel route where the dump truck 2 runs. The processing device 20 includes a travel control unit 20D. The travel control unit 20D controls the travel of the dump truck 2 such that the dump truck 2 runs along the created travel route. The control of the travel of the dump truck 2 includes control of operations of the dump truck 2. The operations of the dump truck 2 include at least one of steering, acceleration, and brake operations. The processing device 20 may not include the data processing unit, the prohibited area setting unit, and the travel route creation unit.

The storage device 25 is mounted in the dump truck 2. The storage device 25 is connected to the processing device 20. The storage device 25 includes at least one of a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, and a hard disk drive. The storage device 25 stores various pieces of information on the management of the dump truck 2. The storage device 25 includes a database 25B where information is registered. The storage device 25 stores a computer program for causing the processing device 20 to execute various processes. The storage device 25 can store (register) information equivalent to that of the storage device 13 placed in the control facility 7.

The communication system 9 includes the wireless communication device 28. The wireless communication device 28 is placed in the dump truck 2. The wireless communication device 28 is connected to the processing device 20. The wireless communication device 28 includes the antenna 28A. The wireless communication device 28 can receive information (including an instruction signal) transmitted from at least one of the control apparatus 10 and the vehicle 3. The information received by the wireless communication device 28 is output to the processing device 20. The information received by the wireless communication device 28 is stored (registered) in the storage device 25. The processing device 20 (the travel control unit 20D) can control the travel of the dump truck 2 in accordance with the instruction signal received by the wireless communication device 28. The instruction signal includes information on a travel route, and information on a travel speed of the dump truck 2. The wireless communication device 28 can transmit information to at least one of the control apparatus 10 and the vehicle 3.

The position detection device 29 is placed in the dump truck 2. The position detection device 29 is connected to the processing device 20. The position detection device 29 includes a GPS receiver, and detects the position (GPS position) of the dump truck 2. The position detection device 29 includes the GPS antenna 29A. The position detection device 29 detects the position (GPS position) of the antenna 29A. The antenna 29A is placed on the dump truck 2. The position (GPS position) of the antenna 29A is detected to detect the position (GPS position) of the dump truck 2. The antenna 29A receives radio waves from the GPS satellites 5. The antenna 29A outputs to the position detection device 29 signals based on the received radio waves. The position detection device 29 detects the position (GPS position) of the antenna 29A based on the signals from the antenna 29A. The position detection device 29 converts into electrical signals the signals based on the radio waves received from the GPS satellites 5 by the antenna 29A and calculates the position (GPS position) of the antenna 29A. The GPS position of the antenna 29A is calculated to obtain the GPS position of the dump truck 2.

<Vehicle>

Next, the vehicle 3 will be described. FIG. 5 is a diagram schematically illustrating the appearance of the vehicle 3 according to the embodiment. FIG. 6 is a control block diagram, of the vehicle 3 according to the embodiment.

As illustrated in FIGS. 5 and 6, the vehicle 3 includes a vehicle body 37, wheels 38, a processing device 30, a storage device 39, a wireless communication device 32 to which an antenna 32A is connected, a position detection device 33 to which an antenna 33A is connected, a display device 36, and an input device 31.

An engine is placed in the vehicle body 37. The wheels 38 rotate with the power transmitted from the engine of the vehicle body 37. The wheel 38 includes a tire and a wheel. The wheels 38 rotate to cause the vehicle 3 to run. In the embodiment, a worker WM rides in the vehicle 3. The driving operation of the worker WM causes the vehicle 3 to run.

The processing device 30 includes a CPU (Central Processing Unit). The processing device 30 executes various processes related to the management of the dump truck 2. The processing device 30 includes a data processing unit, a prohibited area setting unit, and a travel route creation unit, and can execute processes equivalent to those of the processing device 12 placed in the control facility 7 and those of the processing device 20 placed in the dump truck 2. In other words, the data processing unit of the processing device 30 can process information on the position of the dump truck 2, information on the position of the vehicle 3, and information on the position of the landmark 8, the information having been acquired via the communication system 9. The prohibited area setting unit of the processing device 30 can set a prohibited area where at the mine the entry of the dump truck 2 is prohibited. The travel route creation unit of the processing device 30 can create a travel route where the dump truck 2 runs. The processing device 30 may not include the data processing unit, the prohibited area setting unit, and the travel route creation unit.

The storage device 39 is mounted, in the vehicle 3. The storage device 39 is connected to the processing device 30. The storage device 39 includes at least, one of a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, and a hard disk drive. The storage device 39 stores various pieces of information on the management of the dump truck 2. The storage device 39 includes a database 39B where information is registered. The storage device 39 stores a computer program for causing the processing device 30 to execute various processes. The storage device 39 can store (register) information equivalent to that of the storage device 13 placed in the control facility 7 and that of the storage device 25 placed in the dump truck 2.

The display device 36 includes a flat panel display such as a liquid crystal display. The display device 36 can display information on the position of the dump truck 2, information on the position of the vehicle 3, and information on the position of the landmark 8.

The input device 31 includes at least one of a keyboard, a touch panel, and a mouse. The input device 31 functions as an operating unit that can input an operation signal into the processing device 30. The worker (driver) WM of the vehicle 3 can input an operation signal into the processing device 30 by operating the input device 31.

The communication system 9 includes the wireless communication device 32. The wireless communication device 32 is placed in the vehicle 3. The wireless communication device 32 is connected to the processing device 30. The wireless communication device 32 includes the antenna 32A. The wireless communication device 32 can receive information (including an instruction signal) transmitted from at least one of the control apparatus 10 and the dump truck 2. The information received by the wireless communication device 32 is output to the processing device 30. The information received by the wireless communication device 32 is stored (registered) in the storage device 39. The wireless communication device 32 can transmit information to at least one of the control apparatus 10 and the dump truck 2.

The position detection device 33 is placed in the vehicle 3. The position detection device 33 is connected to the processing device 30. The position detection device 33 includes a GPS receiver, and detects the position (GPS position) of the vehicle 3. The position detection device 33 includes the GPS antenna 33A. The position detection device 33 detects the position (GPS position) of the antenna 33A. The antenna 33A is placed on the vehicle 3. The position (GPS position) of the antenna 33A is detected to detect the position (GPS position) of the vehicle 3. The antenna 33A receives radio waves from the GPS satellites 5. The antenna 33A outputs to the position detection device 33 signals based on the received radio waves. The position detection device 33 detects the position (GPS position) of the antenna 33A based on the signals from the antenna 33A. The position detection device 33 converts into electrical signals the signals based on the radio waves received from the GPS satellites 5 by the antenna 33A and calculates the position (GPS position) of the antenna 33A. The GPS position of the antenna 33A is calculated to obtain the GPS position of the vehicle 3.

In the embodiment, a GPS antenna 34A is mounted on the vehicle 3. The antenna 34A receives radio waves from the GPS satellites 5. The antenna 34A is mounted in a releasable manner in the vehicle 3. The antenna 34A released from the vehicle 3 can be moved to the outside of the vehicle 3. The antenna 34A can be moved to a position away from the vehicle 3. The antenna 34A is portable. The worker WM can carry (hold) the antenna 34A. The worker WM can move to the outside of the vehicle 3 holding the antenna 34A. The worker WM can move to a position away from the vehicle 3 holding the antenna 34A. The antenna 34A can receive radio waves from the GPS satellites 5 while being placed, outside the vehicle 3.

A position detection device 34 is placed in the vehicle 3. The position detection device 34 is connected to the processing device 30. The position detection device 34 includes a GPS receiver. The position detection device 34 and the antenna 34A are connected via a cable 35. The position detection device 34 detects the position (GPS position) of the antenna 34A. If the worker WM is carrying the antenna 34A, the position (GPS position) of the antenna 34A is detected to detect the position (GPS position) of the worker WM. If the antenna 34A is placed in the vicinity of an object, the position (GPS position) of the antenna 34A is detected to detect the position (GPS position) of the object. The antenna 34A receives radio waves from the GPS satellites 5. The antenna 34A outputs signals based on the received radio waves to the position detection device 34 via the cable 35. The position detection device 34 detects the position (GPS position) of the antenna 34A based on the signals from the antenna 34A. The position detection device 34 converts into electrical signals the signals based on the radio waves received from the GPS satellites 5 by the antenna 34A and calculates the position (GPS position) of the antenna 34A. The GPS position of the antenna 34A is calculated to obtain the GPS position of the object (including the worker WM) situated in the vicinity of the antenna 34A.

<Method of Use of Landmark>

Next, a method of use of the landmark 8 will be described. FIG. 7 is a diagram schematically illustrating an example of a state where the landmark 8 is being detected by the non-contact sensor 24 of the dump truck 2. The landmarks 8 are respectively placed at the load site LPA, the dump site DPA, and the haul road HL. For the haul road HL, the landmarks 8 are placed outside (at the shoulder of) the haul road HL. A plurality of the landmarks 8 is spaced out along the haul road HL. The landmarks 8 may be placed, for example, at intervals of 100 m.

The landmark 8 is a stationary object. The landmark 8 does not move from its installed position (place). The landmark 8 is a structure (feature) placed along the travel route. The landmark 8 is detected by the non-contact sensor 24 placed on the dump truck 2. The landmark 8 includes a reflecting portion (reflecting surface) that can reflect a radio wave emitted from the non-contact sensor 24. The reflectance (reflection intensity) of the reflecting portion of the landmark 8 with respect to a radio wave is higher than the reflectance (reflection intensity) of an object around the landmark 8. The objects around the landmark 8 include at least one of a rock, the running dump truck 2, and the vehicle 3 at the mine.

The non-contact sensor 24 includes a radar. The non-contact sensor 24 includes an emission unit that can emit a radio wave and a receiving unit that can receive a radio wave. The non-contact sensor 24 is placed at the front of the dump truck 2. At least part of the radio wave emitted from the emission unit of the non-contact sensor 24 and irradiated to the landmark 8 is reflected from the reflecting portion of the landmark 8. The non-contact sensor 24 receives, at the receiving unit, the radio wave reflected from the reflecting portion of the landmark 8. The non-contact sensor 24 receives the radio wave from the landmark 8 and detects the relative position between the non-contact sensor 24 and the landmark 8. The non-contact sensor 24 is fixed to the dump truck 2. The relative position between the non-contact sensor 24 and the landmark 8 is detected to detect the relative position between the dump truck 2 and the landmark 8. The relative position of the landmark 8 with respect to the dump truck 2 is detected by the non-contact sensor 24 placed on the dump truck 2.

In the embodiment, the radio wave from the non-contact sensor 24 propagates so as to expand from the emission portion of the non-contact sensor 24. The landmark 8 is placed in a propagation area (propagation space) where the radio wave emitted from the non-contact sensor 24 propagates, which enables the non-contact sensor 24 to detect the landmark 8. Moreover, the radio wave emitted from the non-contact sensor 24 attenuates as it travels. In other words, the intensity of the radio wave emitted from the non-contact sensor 24 decreases as the radio wave travels. The landmark 8 is placed in the propagation area (propagation space) where the radio wave emitted from the non-contact sensor 24 propagates in a state of maintaining intensity equal to or more than a predetermined value, which enables the non-contact sensor 24 to detect the landmark 8. In the following description, the radio wave propagation area (propagation space) where the non-contact sensor 24 can detect the landmark 8 based on the radio wave emitted from the non-contact sensor 24 is referred to as a detection area (detection space) 300 of the non-contact sensor 24 as appropriate. The landmark 8 is placed in the detection area 300 of the non-contact sensor 24 to enable the non-contact sensor 24 to detect the landmark 8.

The non-contact sensor 24 may detect the landmark 8 using detection light (laser light). In other words, the non-contact sensor 24 may include a radiation unit that can radiate the detection light, and a receiving unit that can receive at least part of the detection light radiated from the radiation unit and then reflected from the landmark 8. The landmark 8 is placed in an irradiation area (irradiation space) where the detection light radiated from the non-contact sensor 24 is irradiated, which enables the non-contact sensor 24 to detect the landmark 8. Moreover, the detection light radiated from the non-contact sensor 24 attenuates as it travels. The landmark 8 is placed in the irradiation area (irradiation space) where the detection light radiated from the non-contact sensor 24 is irradiated in a state of maintaining intensity equal to or more than a predetermined value, which enables the non-contact sensor 24 to detect the landmark 8. If the non-contact sensor 24 detects the landmark 8 with the detection light, the detection area 300 of the non-contact sensor 24 includes the detection light irradiation area (irradiation space) where the landmark 8 can be detected based on the detection light radiated from the non-contact sensor 24.

In the embodiment, GPS (Global Positioning System) is used to detect the position (GPS position, absolute position) of the landmark 8. The GPS position of the landmark 8, which was detected using GPS, is registered in the storage device 13 of the control apparatus 10. Moreover, information on the relative position between the dump truck 2 and the landmark 8, which was detected using the non-contact sensor 24, is transmitted to the control apparatus 10 (the processing device 12) via the communication system 9. The processing device 12 can obtain the absolute position (GPS position) of the dump truck 2 based on the information on the relative position between the dump truck 2 and the landmark 8 detected using the non-contact sensor 24, and information on the absolute position (GPS position) of the landmark 8 registered (stored) in the storage device 13.

The GPS position of the landmark 8 detected using GPS may be registered in the storage device 25 of the dump truck 2. The processing device 20 of the dump truck 2 may obtain the absolute position (GPS position) of the dump truck 2 based on the information on the relative position between the dump truck 2 and the landmark 8 detected using the non-contact sensor 24, and the information on the absolute position (GPS position) of the landmark 8 registered (stored) in the storage device 25.

<Traveling Method of Dump Truck>

Next, an example of a traveling method of the dump truck 2 according to the embodiment will be described. The processing device 12 transmits an instruction signal to the processing device 20 (the travel control unit 20D) of the dump truck 2 via the communication system 9 (the wireless communication device 18 and the wireless communication device 28). The instruction signal includes information on travel conditions of the dump truck 2. The information on the travel conditions include information on a travel route created by the processing device 12, and information on the travel speed of the dump truck 2. The processing device 20 (the travel control unit 20D) controls operations (at least one of steering, acceleration, and brake operations) of the dump truck 2 based on the instruction signal transmitted from the processing device 12 via the communication system 9, and controls the travel of the dump truck 2.

An example where the dump truck 2 runs based on dead reckoning will be described. In the embodiment, the dump truck 2 runs on at least parts of the load site LPA, the dump site DPA, and the haul road HL in accordance with the travel conditions including a travel route created by the processing device 12 of the control apparatus 10, and a travel speed (target travel speed) set by the processing device 12. In the embodiment, the processing device 20 causes the dump truck 2 to run on at least parts of the mine in accordance with the created travel route while estimating the current position of the dump truck 2 using dead reckoning. Dead reckoning is navigation that estimates the current position of an object (the dump truck 2) based on a direction (amount of directional change) and a travel distance relative to a starting point whose longitude and latitude are known. The direction (amount of directional change) of the dump truck 2 is detected using the gyro sensor 26 placed in the dump truck 2. The travel distance of the dump truck 2 is detected using the speed sensor 27 placed in the dump truck 2. A detection signal of the gyro sensor 26 and a detection signal of the speed sensor 27 are output to the processing device 20 of the dump truck 2. The processing device 20 can obtain the direction (amount of directional change) of the dump truck 2 from the known starting point based on the detection signal from the gyro sensor 26. The processing device 20 can obtain the travel distance of the dump truck 2 from the known starting point based on the detection signal from the speed sensor 21. The processing device 20 calculates control amounts of the travel of the dump truck 2 based on the detection signals from the gyro sensor 26 and the speed sensor 27 so as to cause the dump truck 2 to run along the created travel route. The control amounts include a steering amount (steering instruction) and a travel speed adjustment amount (speed instruction). The processing device 20 controls the travel (operation) of the dump truck 2 based on the calculated control amounts so as to cause the dump truck 2 to run along the travel route.

Next, a description will be given of an example where the dump truck 2 runs while an estimated position obtained by dead reckoning is corrected using GPS. As the travel distance of the dump truck 2 increases, an error may be caused between an estimated position (estimated position) and an actual position due to the accumulation of detection errors of one or both of the gyro sensor 26 and the speed sensor 27. As a consequence, the dump truck 2 may run off the travel route created by the processing device 12. In the embodiment, the processing device 20 causes the dump truck 2 to run while correcting the position (estimated position) of the dump truck 2 derived (estimated) by dead reckoning with information on the position (GPS position) of the dump truck 2 detected by the position detection device 29. The processing device 20 calculates the control amounts of the travel of the dump truck 2, the control amounts including a correction amount for correcting the position of the dump truck 2, based on the detection signal from the gyro sensor 26, the detection signal from the speed sensor 27, and the information on the GPS position of the dump truck 2 from the position detection device 29 so as to cause the dump truck 2 to run along the travel route. The processing device 20 controls the travel (operation) of the dump truck 2 based on the calculated correction amount and control amounts so as to cause the dump truck 2 to run along the travel route.

Next, a description will be given of an example where the dump truck 2 runs while the estimated position obtained by dead reckoning is corrected using the landmark 8. There may arise, at the mine, states where detection accuracy (position determination accuracy) by GPS is reduced and where detection (position determination) by GPS becomes impossible. For example, if the antenna 29A cannot fully receive radio waves from the GPS satellites 5 at the mine due to the influence of an obstacle, or if the number of the GPS satellites 5 from which the antenna 29A can receive radio waves is small, there may arise states where detection accuracy by GPS is reduced, and where detection by GPS becomes impossible. In the embodiment, if it is difficult to correct the estimated position obtained by dead reckoning using GPS, the processing device 20 makes a correction using the landmark 8. In other words, if a correction of the estimated position using GPS is not made, the processing device 20 corrects the position (estimated position) of the dump truck 2 obtained by dead reckoning, using information on the position (GPS position, absolute position) of the dump truck 2 detected using the landmark 8 and the non-contact sensor 24.

FIG. 8 is a flowchart illustrating an example of a traveling method of the dump truck 2 including the correction of the estimated position using the landmark 8 and the non-contact sensor 24. Prior to the operation of the dump truck 2, a plurality of the landmarks 8 is installed at the load site LPA, the dump site DPA, and the haul road HL. The positions (GPS positions, absolute positions) of the plurality of the landmarks 8 are respectively detected using GPS. Information on the positions (GPS positions) of the landmarks 8 detected using GPS is registered (stored) in the storage device 13 (step SA1). The information on the positions of the landmarks 8 may be transmitted to the dump truck 2 via the communication system 9 and registered (stored) in the storage device 25. The installation of the landmarks 8 and the detection of the positions of the landmarks 8 using GPS may be performed concurrently with the operation of the dump truck 2.

The processing device 20 causes the dump truck 2 to run based on dead reckoning (step SA2). In other words, the processing device 20 causes the dump truck 2 to run while estimating the position of the dump truck 2 based on the direction (amount of directional change) of the dump truck 2 obtained from a detection signal from the gyro sensor 26 and the travel distance of the dump truck 2 obtained from a detection signal from the speed sensor 27.

Radio waves are emitted from the non-contact sensor 24 during the travel of the dump truck 2. Detection signals of the non-contact sensor 24 are output to the processing device 20. The processing device 20 determines whether or not the landmark 8 has been detected based on the detection signals from the non-contact sensor 24 (step SA3).

If determining in step SA3 that the landmark 8 has been detected), the processing device 20 compares the absolute positions (GPS positions) of the landmarks 8 registered in step SA1 with the relative position between the dump truck 2 and the landmark 8 detected using the non-contact sensor 24 (step SA4). The absolute position (GPS position) of the dump truck 2 is derived based on information on the relative position between the dump truck 2 and the landmark 8 detected using the non-contact sensor 24 and information on the registered (stored) absolute positions of the landmarks 8.

When the absolute position of the dump truck 2 is derived based on the registered absolute positions of the landmarks 8 and the relative position between the dump truck 2 and the landmark 8 detected using the non-contact sensor 24, the processing device 20 extracts information on the position (absolute position) of the landmark 8 corresponding to the landmark 8 detected by the non-contact sensor 24 from the plurality of the landmarks 8 registered in the storage device 13 (the storage device 25). Out of the plurality of the registered landmarks 8, the landmark 8 corresponding to the landmark 8 detected by the non-contact sensor 24 includes the landmark 8 existing at the closest position (GPS position) to the position (estimated position) of the dump truck 2 derived based on dead reckoning when the landmark 8 was detected using the non-contact sensor 24, among the plurality of the registered landmarks 8. Out of the plurality of the registered landmarks 8, the landmark 8 corresponding to the landmark 8 detected by the non-contact sensor 24 includes the landmark 8 determined to be placeable in the detection area 300 of the non-contact sensor of the dump truck 2 existing at the position (estimated position) derived based on dead reckoning among the plurality of the registered landmarks 8. For example, the processing device 20 extracts, from the plurality of the registered landmarks 8, the landmark 8 existing at the closest position (GPS position) to the position (estimated position) of the dump truck 2 derived based on dead reckoning when the landmark 8 was detected using the non-contact sensor 24. The landmarks 8 are placed, for example, at intervals of 100 m. The size of the detection area 300 of the non-contact sensor 24 with respect to the travel direction of the dump truck 2 is, for example, 50 m. Hence, the processing device 20 can extract information on the position (absolute position) of the landmark 8 corresponding to the landmark 8 detected by the non-contact sensor 24, from the plurality of the registered landmarks 8.

The processing device 20 corrects the position (estimated position) of the dump truck 2 based on the result of the comparison in step SA4 (step SA5). For example, if determining that the position of the dump truck 2 deviates from the travel route created by the processing device 12, the processing device 20 corrects the position of the dump truck 2 so as to cause the dump truck 2 to run along the travel route. In other words, the processing device 20 calculates the control amounts of the travel of the dump truck 2, including the correction amount for correcting the position of the dump truck 2, based on a detection signal from the gyro sensor 26, a detection signal from the speed sensor 27, information on the relative position between the dump truck 2 and the landmark 8 detected using the non-contact sensor 24, and information on the absolute positions (GPS positions) of the landmarks 8 stored in the storage device 13 (the storage device 25) so as to cause the dump truck 2 to run along the travel route. The processing device 20 (the travel control unit 20D) controls the travel (operation) of the dump truck 2 based on the calculated correction amount and control amounts so as to cause the dump truck 2 to run along the travel route.

If it is determined in step SA3 that the landmark 8 has not been detected, it is determined whether or not travel is possible by dead reckoning alone without using a detection result of the landmark 8 (step SA6). If a travel distance from a position obtained by correcting the previous estimated position of the dump truck 2 (using one or both of GPS and the landmark 8) is within a predetermined distance, the processing device 20 determines that an error in the estimated position obtained by dead reckoning alone does not matter, and continues the travel of the dump truck 2 based on dead reckoning (step SA2). The predetermined distance is a distance where travel from the position obtained by correcting the estimated position is possible without deviating greatly from the travel route, and is a distance determined in advance. On the other hand, if it is determined in step SA6 that travel is not possible by dead reckoning alone, a stopping process (vehicle stopping process) of the dump truck 2 is performed until position detection by GPS becomes possible (step SA7).

In the embodiment, the example has been described where the processing device 20 of the dump truck 2 controls the travel of the dump truck 2. The control apparatus 10 (operation) of the dump truck 2 based on a detection signal of the gyro sensor 26 and a detection signal of the speed sensor 27 so as to cause the dump truck 2 to run by dead reckoning on the created travel route. The processing device 12 may correct the position (estimated position) of the dump truck 2 obtained by dead reckoning based on the detection result of the position detection device 29. The processing device 12 may correct the position (estimated position) of the dump truck 2 obtained by dead reckoning based on the detection result of the non-contact sensor 24.

EXAMPLE OF POSITION DETECTION PROCESS AND POSITION REGISTRATION PROCESS OF LANDMARK

Next, a description will be given of an example of the position detection process and the position registration process (the process in step SA1 in FIG. 8) of the landmark 8. The position detection process of the landmark 8 is a process of detecting the GPS position of the landmark 8. The position registration process of the landmark 8 is a process of registering (storing) the detected GPS position (information on the GPS position) of the landmark 8 in the storage device 13 (the database 13B). The GPS position of the landmark 8 may be registered in the storage device 25 (the database 25B) of the dump truck 2.

FIG. 9 is a diagram illustrating an example of the position detection process and the position registration process of the landmark 8 according to the embodiment. The position (GPS position) of the landmark 8 installed at the mine is detected using GPS. As illustrated in FIG. 9, the position of the landmark 8 is detected using the GPS antenna 34A.

The vehicle 3 manned by the worker WM moves to the vicinity of the landmark 8 targeted for position detection and position registration. The vehicle 3 moves to the vicinity of the landmark 8 targeted for position detection and position registration with the antenna 34A mounted on the vehicle 3. The vehicle 3 moves (runs) by the driving operation of the worker WM.

The antenna 34A carried (held) by the worker WM is moved to the outside of the vehicle 3. The worker WM moves to the outside of the vehicle 3 carrying (holding) the antenna 34A. The antenna 34A is carried (held) by the worker WM and brought out from the vehicle 3. The position detection device 34 is situated inside the vehicle 3. The antenna 34A and the position detection device 34 are connected via the cable 35.

As illustrated in FIG. 9, the antenna 34A is installed in the vicinity of the landmark 8 installed at the mine. The antenna 34A is installed in the vicinity of the landmark 8 by the worker WM. The antenna 34A is held by the worker WM. The antenna 34A receives radio waves from the GPS satellites 5 while being situated outside the vehicle 3. Signals based, on the radio waves received from the GPS satellites 5 by the antenna 34A are output to the position detection device 34 via the cable 35. The position detection device 34 detects the position (GPS position) of the antenna 34A based on the signals from the antenna 34A. As illustrated in FIG. 9, the antenna 34A outputs to the position detection device 34 the signals based on the radio waves from the GPS satellites 5 while being installed in the vicinity of the landmark 8. Therefore, the position detection device 34 obtains the GPS position of the antenna 34A to obtain the GPS position of the landmark 8. Moreover, as illustrated in FIG. 9, not only the landmark 8 but also the worker WM exists in the vicinity of the antenna 34A. Therefore, the position detection device 34 obtains the GPS position of the antenna 34A to also obtain the GPS position of the worker WM. In other words, in the embodiment, the position detection device 34 simultaneously detects the GPS position of the antenna 34A, the GPS position of the landmark 8, and the GPS position of the worker WM.

Information based on the signals from the antenna 34A is transmitted to the wireless communication device 18 of the control apparatus 10 by the wireless communication device 32 mounted in the vehicle 3. In the embodiment, the information on the signals from the antenna 34A includes information on the position (GPS position) of the antenna 34A, information on the position (GPS position) of the landmark 8, and information on the position (GPS position) of the worker WM, the positions having been detected by the position detection device 34 based on the signals from the antenna 34A. The processing device 30 of the vehicle 3 transmits from the wireless communication device 32 the information on the position of the antenna 34A, the information on the position of the landmark 8, and the information on the position of the worker WM. The wireless communication device 18 of the control apparatus 10 receives the information from the wireless communication device 32 of the vehicle 3. The processing device 12 of the control apparatus 10 processes the information on the positions transmitted from the vehicle 3 via the communication system 9 including the wireless communication devices 32 and 18. The processing device 12 registers in the storage device 13 (the database 13B) the information on the position (GPS position) of the landmark 8 obtained using the antenna 34A.

<Position Detection Process and Position Registration Process of Landmark Including Setting of Prohibited Area>

Next, a description will be given of an example where a prohibited area 100 where the entry of the dump truck 2 is prohibited is set in the position detection process and the position registration process of the landmark 8, which have been described with reference to FIG. 9, so as to include the position of the antenna 34A.

As described with reference to FIG. 9, the worker WM carries out work outside the vehicle 3 in the position detection process of the landmark 8. When the worker WM carries out work outside the vehicle 3 during the operation of the dump truck 2, the work of the worker WM may not be carried out smoothly. For example, if the dump truck 2 approaches the worker WM during the execution of work, the worker WM may need to stop the work. As a consequence, productivity and working efficiency at the mine may be reduced. Moreover, also from the viewpoint of securing the safety of the worker WM, a hindrance to the work may be caused. On the other hand, if the operation of the dump truck 2 is stopped while the worker WM is working, productivity at the mine may be reduced.

In the embodiment, the prohibited area 100 (see FIG. 11) where the entry of the dump truck 2 is prohibited is set so as to include the position of the antenna 34A. Consequently, a reduction of productivity at the mine is suppressed.

FIG. 10 is a flowchart illustrating an example of the position detection process and the position registration process of the landmark 8 according to the embodiment. FIG. 11 is a schematic diagram illustrating an example of the prohibited area 100 according to the embodiment.

The vehicle 3 manned by the worker WM moves to the vicinity of the landmark 8 for the position detection process and the position registration process of the landmark 8. Prior to the position detection process and the position registration process of the landmark 8, the antenna 34A and the position detection device 34 are connected via the cable 35 (step SB1).

Prior to the position detection process and the position registration process of the landmark 8, the antenna 33A placed on the vehicle 3 continues to receive radio waves from the GPS satellites 5. The position detection device 33 detects the position (GPS position) of the antenna 33A based on signals from the antenna 33A. Moreover, prior to the position detection process and the position registration process of the landmark 8, the antenna 34A mounted in the vehicle 3 continues to receive radio waves from the GPS satellites 5. The position detection device 34 detects the position (GPS position) of the antenna 34A based on signals from the antenna 34A. Information on the position (GPS position) of the antenna 33A detected by the position detection device 33, and information on the position (GPS position) of the antenna 34A detected by the position detection device 34 are output to the processing device 30. The processing device 30 transmits from the wireless communication device 32 the information on the position (GPS position) of the antenna 33A detected by the position detection device 33, and the information on the position (GPS position) of the antenna 34A detected by the position, detection device 34. The wireless communication device 32 mounted in the vehicle 3 transmits to the wireless communication device 18 of the control apparatus 10 the information on the position (GPS position) of the antenna 33A detected by the position detection device 33, and the information on the position (GPS position) of the antenna 34A detected by the position detection device 34. The wireless communication device 18 of the control apparatus 10 receives the information on the GPS position of the antenna 33A and the information on the GPS position of the antenna 34A from, the wireless communication device 32, and outputs the information to the processing device 12. Consequently, the processing device 12 acquires the information on the GPS position of the antenna 33A and the information on the GPS position of the antenna 34A.

Prior to going out of the vehicle 3, the worker WM operates the input device 31 placed in the vehicle 3. The worker WM operates the input device 31 prior to performing the position detection process of the landmark 8 outside the vehicle 3. The input device 31 functions as the operating unit that can input an operation signal into the processing device 30. The worker WM operates the input device 31 to start the position detection process of the landmark 8 (step SB2). In the embodiment, the input device 31 includes a touch panel. The touch panel includes a start button for instructing the processing device 30 to start the position detection process of the landmark 8. In the embodiment, the operating unit includes the start button. The worker WM presses (operates) the start button.

The operating unit (start button) of the input device 31 is operated to input an operation signal into the processing device 30. The processing device 30 transmits, from the wireless communication device 32, the operation signal input from the operating unit of the input device 31. The wireless communication device 18 of the control apparatus 10 receives the operation signal from the wireless communication device 32 and outputs the operation signal to the processing device 12. The processing device 12 acquires the operation signal from the input device 31, and then sets the prohibited area 100 where the entry of the dump truck 2 is prohibited so as to include the position of the antenna 34A (step SB3). In the embodiment, the processing device 12 may simultaneously perform the acquisition of the operation signal from the input device 31 and the setting of the prohibited area 100. The processing device 12 may set the prohibited area 100 after a lapse of a predetermined time (for example, after a lapse of one second) since the acquisition of the operation signal from the input device 31.

The processing device 12 sets the prohibited area 100 based on the detection result of the position detection device 34 acquired via the communication system 9 so as to include the position of the antenna 34A. The position detection device 34 detects the GPS position of the antenna 34A. The processing device 12 can set the prohibited area 100 based on the GPS coordinate system so as to include the GPS position of the antenna 34A.

As described above, prior to going out of the vehicle 3, the worker WM operates the input device 31 placed in the vehicle 3. In the embodiment, the prohibited area 100 is set before the worker WM goes out of the vehicle 3 (while the worker WM is inside the vehicle 3). In the embodiment, the prohibited area 100 is set in the state where the antenna 34A is mounted in the vehicle 3 (in the state where the antenna 34A is placed inside the vehicle 3).

In the embodiment, the prohibited area 100 where the entry of the dump truck 2 is prohibited is set prior to the position detection process and the position registration process of the landmark 8 so as to include the position of the antenna 33A. The processing device 12 sets the prohibited area 100 based on the detection result of the position detection device 33 acquired via the communication system 9 so as to include the position of the antenna 33A. The position detection device 33 detects the GPS position of the antenna 33A. The processing device 12 can set the prohibited area 100 based on the GPS coordinate system so as to include the GPS position of the antenna 33A. The processing device 12 sets the prohibited area 100 such that the antenna 33A and the vehicle 3 are situated in the prohibited area 100.

The processing device 12 transmits an instruction signal to the dump truck 2 via the communication system 9 to prevent the dump truck 2 from entering the prohibited area 100. The instruction signal is transmitted from the wireless communication device 18 placed in the control facility 7 to the wireless communication device 28 placed in the dump truck 2. The instruction signal includes information on travel conditions set so as to cause the running dump truck 2 to stop before the prohibited area 100 (so as to prevent the running dump truck 2 from entering the prohibited area 100). The wireless communication device 28 of the dump truck 2 receives the instruction signal from the wireless communication device 18 of the control apparatus 10 and outputs the instruction signal to the processing device 20. The processing device 20 (the travel control unit 20D) controls the travel (operation) of the dump truck 2 so as to prevent the dump truck 2 from entering the prohibited area 100. The prohibited area 100 is defined in the GPS coordinate system. The processing device 12 (the travel route creation unit 12C) creates a travel route in the GPS coordinate system. The processing device 20 controls the travel of the dump truck 2 based on the GPS position of the dump truck 2. In other words, the prohibited area 100, the position of the dump truck 2, and the travel route are respectively defined in the GPS coordinate system. Therefore, the processing device 12 can create a travel route and determine travel speed so as to prevent the dump truck 2 from entering the prohibited area 100. The processing device 12 can transmit an instruction signal to the dump truck 2 so as to prevent the dump truck 2 from entering the prohibited area 100. The processing device 20 can control the dump truck 2 so as to prevent the dump truck 2 from entering the prohibited area 100.

In the embodiment, the prohibited area 100 is set so as to include the position of the antenna 33A fixed to the vehicle 3, whether the input device 31 is operated or not. The prohibited area 100 is continued to be set so as to include the position of the antenna 33A at least during the operation of the dump truck 2. The prohibited area 100 is set so as to include the position of the antenna 33A, whether the position detection process and the position registration process of the landmark 8 are performed or not. In the embodiment, when at least the vehicle 3 runs at the mine, the prohibited area 100 is set so as to include the position of the antenna 33A. The prohibited area 100 set so as to include the position of the antenna 33A is set so as to include the vehicle 3. The prohibited area 100 including the position of the antenna 33A and the position of the vehicle 3 is continued to be set also during the travel of the vehicle 3. Consequently, if the vehicle 3 runs at the mine, the dump truck 2 is prohibited from approaching the vehicle 3.

In other words, in the embodiment, the prohibited area 100 is set so as to include the position of the antenna 33A (the vehicle 3), prior to the operation of the input device 31. The prohibited area 100 is set so as to include both the position of the antenna 33A (the vehicle 3) and the position of the antenna 34A, subsequent to the operation of the input device 31.

In the embodiment, the travel condition (travel speed) of the dump truck 2 is set such that the dump truck 2 approaching the prohibited area 100 does not change the travel route but gradually decreases in travel speed and stops before the prohibited area 100. For example, the travel condition is set such that the travel route between the dump truck 2 and the prohibited area 100 is divided into a plurality of sections and the travel speed is gradually reduced in each section from the dump truck 2 toward the prohibited area 100.

The dump truck 2 may stop before the prohibited area 100 or may run skirting around the prohibited area 100. The dump truck 2 runs skirting around the prohibited area 100 to prevent the operation of the dump truck 2 from being stopped. Accordingly, a reduction in productivity at the mine is suppressed.

After the prohibited area 100 is set so as to include the position of the antenna 33A and the position of the antenna 34A, the position detection process of the landmark 8 is started (step SB4). The worker WM goes out of the vehicle 3 carrying (holding) the antenna 34A. The prohibited area 100 including the position of the antenna 34A is set so as to include the worker WM. Therefore, the worker WM, who has gone out of the vehicle 3, is situated in the prohibited area 100. Moreover, the antenna 34A is situated in the vicinity of the landmark 8 and accordingly the landmark 8 is situated in the prohibited area 100. In the embodiment, the antenna 34A, the landmark 8, and the worker WM are situated in the prohibited area 100.

FIG. 11 is a diagram illustrating an example of the prohibited area 100. In the example illustrated in FIG. 11, the prohibited area 100 is set as one area including both the position of the antenna 33A and the position of the antenna 34A. In the example illustrated in FIG. 11, the external shape of the prohibited area 100 is a circle. The external shape of the prohibited area 100 may be a polygon such as a rectangle. The antenna 33A, the vehicle 3, the antenna 34A, the landmark 8, and the worker WM are situated in the prohibited area 100. In the embodiment, the cable 35 is also situated in the prohibited area 100. The prohibited area 100 is defined based on the GPS coordinate system. Therefore, the prohibited area 100 is set to enable the processing device 12 to prohibit the dump truck 2 running based on the GPS coordinate system from entering the inside of the prohibited area 100.

An instruction signal is transmitted from the communication system 9 to the processing device 20 of the dump truck 2 to prevent the dump truck 2 from entering the prohibited area 100. The processing device 20 controls the travel (operation) of the dump truck 2 to prevent the dump truck 2 from entering the prohibited area 100.

FIG. 12 is a diagram illustrating an example of the prohibited area 100. As illustrated in FIG. 12, the processing device 12 changes the size of the prohibited area 100 based on the relative position between the antenna 33A and the antenna 34A. As illustrated in FIG. 12, the worker WM holding the antenna 34A may move on the outside of the vehicle 3. The processing device 12 changes the size (dimension) of the prohibited area 100 based on the detection result of the position detection device 33 and the detection result of the position detection device 34 such that both of the vehicle 3 and the worker WM moving on the outside of the vehicle 3 are continued to be situated in the prohibited area 100. The processing device 12 updates the prohibited area 100 based on the positions of the antennas 33A and 34A such that the vehicle 3 and the worker WM are both situated in the prohibited area 100. In the example illustrated in FIG. 12, the antenna 34A (the worker WM holding the antenna 34A) moves away from the vehicle 3. If the antenna 34A (the worker WM holding the antenna 34A) moves away from the vehicle 3, the prohibited area 100 is expanded. If the antenna 34A (the worker WM holding the antenna 34A) moves close to the vehicle 3, the prohibited area 100 is reduced. Even if the antenna 34A (the worker WM holding the antenna 34A) moves relative to the vehicle 3, the size of the prohibited area 100 is not necessarily changed. Even if the antenna 34A (the worker WM holding the antenna 34A) moves relative to the vehicle 3, as long as the vehicle 3 and the worker WM are situated in the prohibited area 100, the size of the prohibited area 100 is not necessarily changed.

In the embodiment, information on the position (GPS position) of the landmark 8 obtained using the GPS antenna 34A is temporarily stored (held) in the storage device 39 of the vehicle 3. After the position detection process of the landmark 8 ends, the worker WM returns to the inside of the vehicle 3 (rides in the vehicle 3) carrying the antenna 34A. The antenna 34A is loaded into the vehicle 3.

Next, the position registration process of the landmark 8 is performed. The information on the position (GPS position) of the landmark 8 obtained using the GPS antenna 34A is registered (stored) in the storage device 13 (the database 133) of the control apparatus 10. In the embodiment, the input device 31 placed in the vehicle 3 is operated to register the position of the landmark 8 in the storage device 13. The input device 31 functions as the operating unit that can input an operation signal into the processing device 30. The worker WM operates the input device 31 to start the position registration process of the landmark 8 (step SB5). In the embodiment, the input device 31 includes the touch panel. The touch panel includes a registration button for instructing the processing device 30 to start the position registration process of the landmark 3. The operating unit includes the registration button. The worker WM presses (operates) the registration button.

The operation of the input device 31 causes the processing device 30 to transmit from the wireless communication device 32 the information on the position of the landmark 8 temporarily stored in the storage device 39. The wireless communication device 32 transmits the information on the position of the landmark 8 to the wireless communication device 18 of the control apparatus 10. The wireless communication device 18 outputs to the processing device 12 the received information on the position of the landmark 8. The processing device 12 registers the acquired information on the position (GPS position) of the landmark 8 in the database 13B of the storage device 13 (step SB6).

If a worker (occupant) WM different from the worker WM who is working outside the vehicle 3 is in the vehicle 3, the occupant WM may operate the registration button before the worker WM who is working outside the vehicle 3 returns to the inside of the vehicle 3.

The information on the position of the landmark 8 is temporarily stored in the storage device 13 of the control apparatus 10 via the communication system 9, and the input device 17 of the control apparatus 10 is operated by the controller, and accordingly the information on the position of the landmark 8 temporarily stored in the storage device 13 may be registered in the database 13B.

The worker WM rides in the vehicle 3 and mounts the antenna 34A in the vehicle 3 and accordingly the position detection process of the landmark 8 ends. In the embodiment, the worker WM rides in the vehicle 3 and then operates the input device 31 placed in the vehicle 3. The input device 31 functions as the operating unit that can input an operation signal into the processing device 30. The worker WM operates the input device 31 to end the position detection process of the landmark 8 (step SB7). In the embodiment, the input device 31 includes the touch panel. The touch panel includes an end button for instructing the processing device 30 to end the position detection process of the landmark 8. The operating unit includes the end button. The worker WM presses (operates) the end button.

The operating unit (end button) of the input device 31 is operated to input an operation signal into the processing device 30. The processing device 30 transmits, from the wireless communication device 32, the operation signal input from the operating unit of the input device 31. The wireless communication device 18 of the control apparatus 10 receives the operation signal from the wireless communication device 32 and outputs the operation signal to the processing device 12. The processing device 12 cancels the setting of the prohibited area 100 including the position of the antenna 34A after the operation signal is input from the input device 31.

With the above, the position detection process and the position registration process of the landmark 8 end. The worker WM may operate (drive) the vehicle 3 and, for example, return to the control facility 7. The worker WM may move operating (driving) the vehicle 3 for the position detection process and the position registration process of another landmark 8.

In the embodiment, even after the setting of the prohibited area 100 including the position of the antenna 34A is canceled, the prohibited area 100 including the position of the antenna 33A is continued to be set. Consequently, even if the vehicle 3 runs at the mine, the dump truck 2 is prohibited from approaching the vehicle 3.

The setting of the prohibited area 100 including the position of the antenna 34A may not be canceled after the end of the position detection process of the landmark 8.

As described above, according to the embodiment, it is configured such that the prohibited area 100 is set based on the GPS position of the antenna 33A so as to include the GPS position of the antenna 33A. Accordingly, the dump truck 2 is prevented from approaching the vehicle 3. Therefore, a reduction in the working efficiency of the worker WM manning the vehicle 3 is suppressed. Moreover, the safety of the vehicle 3 (the worker WM manning the vehicle 3) is secured. Moreover, according to the embodiment, it is configured such that the prohibited area 100 is set based on the GPS position of the antenna 33A and the GPS position of the antenna 34A so as to include both GPS positions of the antennas 33A and 34A. Accordingly, the dump truck 2 is prevented from approaching each of the antenna 33A (the vehicle 3) and the antenna 34A. Therefore, even if work using the antenna 34A is carried out outside the vehicle 3, a reduction in its working efficiency is suppressed. Moreover, the safety of the worker WM existing in the prohibited area 100 including the position of the antenna 34A is secured. Moreover, the dump truck 2 does not enter each of the prohibited area (working area) 100 including the position of the antenna 33A, and the prohibited area (working area) 100 including the position of the antenna 34A. Accordingly, for example, an interruption of work in the prohibited area (working area) 100 at the approach of the dump truck 2 is suppressed.

In the embodiment, it is configured such that the position detection device 34 is placed in the vehicle 3, and the antenna 34A and the position detection device 34 are connected via the cable 35. Both of the antenna 34A and the position detection device 34 may be brought out from the vehicle 3. For example, a portable GPS device with the built-in antenna 34A and position detection device 34 may be used to detect positional information. Both the antenna 34A and the position detection device 34 can be brought out from the vehicle 3 and accordingly the cable 35 can be omitted. The same shall apply to the following embodiments.

<Modification of Prohibited Area>

FIG. 13 is a modification of the prohibited area 100. In FIG. 13, the prohibited area 100 includes a prohibited area 100A including the position of the antenna 33A, and a prohibited area 100B that is set away from the prohibited area 100A and includes the position of the antenna 34A. The processing device 12 sets the prohibited area 100A based on the detection result of the position detection device 33 so as to include the position of the antenna 33A. The processing device 12 sets the prohibited area 100B based on the detection result of the position detection device 34 so as to include the position of the antenna 34A. The prohibited area 100A is set so as to include the antenna 33A and the vehicle 3. The prohibited area 100B is set so as to include the antenna 34A, the landmark 8, and the worker WM. The processing device 12 transmits an instruction signal to the dump truck 2 via the communication system 9 to prevent the dump truck 2 from entering the prohibited areas 100A and 100B. Consequently, the dump truck 2 is prevented from entering the inside of the prohibited areas 100A and 100B. Therefore, a reduction in the working efficiency of work carried, out in the prohibited area 100A and a reduction in the working efficiency of work carried out in the prohibited area 100B are suppressed. Moreover, the safety of the worker WM and the vehicle 3 is secured.

In the example illustrated in FIG. 13, the processing device 12 may change the position of the prohibited area 100B based on the position of the antenna 34A. For example, if the worker WM moves with the antenna 34A, the prohibited area 100B may be moved based on the detection result of the position detection device 34 such that the worker WM and the antenna 34A continue to be situated in the prohibited area 100B. In other words, the processing device 12 may move the prohibited area 100B in synchronization with the antenna 34A (the worker WM).

<Modifications of Prohibited Area>

FIG. 14 is a modification of the prohibited area 100. In FIG. 14, the management system 1 includes the antenna 33A placed on the vehicle 3, an antenna 34Aa mounted in a releasable manner in the vehicle 3, and an antenna 34Ab mounted in a releasable manner in the vehicle 3. In other words, in the example illustrated in FIG. 14, the antennas 34Aa and 34Ab, which can be carried by the worker WM, are provided. The processing device 12 may set the prohibited area 100 based on the position (GPS position) of the antenna 33A, the position (GPS position) of the antenna 34 a, and the position (GPS position) of the antenna 34Ab so as to include the position (GPS position) of the antenna 33A, the position (GPS position) of the antenna 34Aa, and the position (GPS position) of the antenna 34Ab.

FIG. 15 is a modification of the prohibited area 100. In FIG. 15, the management system 1 includes the antenna 33A placed on the vehicle 3, the antenna 34Aa mounted in a releasable manner in the vehicle 3, and the antenna 34Ab mounted in a releasable manner in the vehicle 3. In other words, also in the example illustrated in FIG. 15, the antennas 34Aa and 34Ab, which can be carried by the worker WM, are provided. The processing device 12 may set the prohibited area 100A including the position (GPS position) of the antenna 33A, the prohibited area 100B that is set away from the prohibited area 100A and includes the prohibited area 100C that is set away from each of the prohibited areas 100A and 100B and includes the position (GPS position) of the antenna 34Ab, based on the position (GPS position) of the antenna 33A, the position (GPS position) of the antenna 34 a, and the position (GPS position) of the antenna 34Ab.

In the above-mentioned embodiments, the example has been described where the processing device 12 of the control facility 7 (the control apparatus 10) acquires the detection result of the position detection device 33 and the position detection result of the position detection device 34 via the communication system 9, sets the prohibited area 100, and transmits an instruction signal to the dump truck 2. The processing device 20 of the dump truck 2 may acquire the detection result of the position detection device 33 and the position detection result of the position detection device 34 and set the prohibited area 100. The processing device 20 of the dump truck 2 may control the travel of the dump truck 2 based on the set prohibited area 100 so as to prevent the dump truck 2 from entering the prohibited area 100.

In the above-mentioned embodiments, the processing device 30 of the vehicle 3 may acquire the detection result of the position detection device 33 and the position detection result of the position detection device 34 via the communication system 9 (the wireless communication devices 28 and 32) and set the prohibited area 100. The processing device 30 of the vehicle 3 may transmit information on the set prohibited area 100 to the dump truck 2 via the communication system 9 (the wireless communication devices 32 and 28). In other words, the information on the prohibited area 100 set by the processing device 30 may be transmitted from the wireless communication device 32 of the vehicle 3 to the wireless communication device 28 of the dump truck 2. The processing device 20 of the dump truck 2 may control the travel of the dump truck 2 based on the prohibited area 100 set by the processing device 30 of the vehicle 3 so as to prevent the dump truck 2 from entering the prohibited area 100.

In the above-mentioned embodiments, it is configured such that the position detection process of the landmark 8 is carried out in the prohibited area 100. The process (work) carried out in the prohibited area 100 is not limited to the position detection process of the landmark 8. For example, the maintenance work of the haul road HL or the repair work of equipment may be carried out in the prohibited area 100 set based on the antenna 34A. Also in this case, the prohibited area (working area) 100 is set so as to include the position of the antenna 34A and accordingly the safety of the worker WM is secured and a reduction in working efficiency is suppressed.

In the above-mentioned embodiments, the example has been described where the worker WM carries out work (a process) in the prohibited area 100. Also in the work (process) without the worker WM, the prohibited area (working area) 100 is set so as to include the position of the antenna 34A and accordingly a reduction in the working efficiency of the work in the prohibited area (working area) 100 is suppressed. For example, when a raining machine (for example, a motor grader) different from the vehicle 3 and the dump truck 2 operates at the mine, the prohibited area 100 may be placed including the mining machine in order to carry out work using the mining machine smoothly. The mining machine operates in the prohibited area 100 and accordingly, even if the dump truck 2 approaches, it is not necessary to stop the operation of the mining machine. Moreover, the mining machine operates in the prohibited area 100 and accordingly it is not necessary to stop the operation of the dump truck 2. In other words, the mining machine is situated in the prohibited area 100 and accordingly the dump truck 2 can operate concurrently with the operation of the mining machine. Therefore, reductions in working efficiency and productivity at the mine are suppressed.

In the above-mentioned embodiments, the dump truck 2 may be what is called a manned dump truck that operates by operations by a worker (driver). If the prohibited area 100 is set, the communication system 9 may transmit an instruction signal so as to prevent the dump truck (manned dump truck) 2 from entering the prohibited area 100. The communication system 9 may, for example, transmit an instruction signal including an alert (warning) to the dump truck 2 approaching the prohibited area 100.

The elements of the above-mentioned embodiments include elements that can be easily assumed by those skilled in the art, and substantially the same elements, what is called elements within the range of equivalents. Moreover, the elements of the above-mentioned embodiments can be combined as appropriate. Moreover, a part of the components may not be used.

REFERENCE SIGNS LIST

1 MANAGEMENT SYSTEM

2 DUMP TRUCK (MINING MACHINE)

3 VEHICLE

4 LOADING MACHINE

9 COMMUNICATION SYSTEM

10 CONTROL APPARATUS

12 PROCESSING DEVICE

13 STORAGE DEVICE

18 WIRELESS COMMUNICATION DEVICE

20 PROCESSING DEVICE

25 STORAGE DEVICE

28 WIRELESS COMMUNICATION DEVICE

29 POSITION DETECTION DEVICE

29A ANTENNA

30 PROCESSING DEVICE

31 INPUT DEVICE

32 WIRELESS COMMUNICATION DEVICE

33 POSITION DETECTION DEVICE

33A ANTENNA

34 POSITION DETECTION DEVICE

34A ANTENNA

39 STORAGE DEVICE

100 PROHIBITED AREA

DPA DUMP SITE

HL HAUL ROAD

LPA LOAD SITE 

1. A management system of a mining machine comprising: a vehicle able to run at a mine; a first antenna, placed in the vehicle, configured to receive radio waves from GPS satellites; a portable second antenna, mounted in a releasable manner in the vehicle, configured to receive radio waves from the GPS satellites; a first detection device, placed in the vehicle, configured to detect a position of the first antenna based on a signal from the first antenna; a second detection device configured to detect a position of the second antenna based on a signal from the second antenna; and a processing device configured to set a prohibited area where an entry of a mining machine able to run at the mine is prohibited based on a detection result of the first detection device and a detection result of the second detection device, such that the prohibited area includes the position of the first antenna and the position of the second antenna.
 2. The management system of a mining machine according to claim 1, wherein the second detection device is placed in the vehicle, and the second antenna is configured to receive radio waves from the GPS satellites in a state of being placed outside the vehicle.
 3. The management system of a mining machine according to claim 1, wherein the second antenna is an antenna carried by a worker manning the vehicle.
 4. The management system of a mining machine according to claim 1, further comprising an operating unit, placed in the vehicle, configured to allow an input of a signal into the processing device, and the operating unit is operated to perform at least one of the setting of the prohibited area including the position of the second antenna and a cancellation of the setting.
 5. The management system of a mining machine according to claim 1, wherein the mining machine is operated on at least a part of a load site, a dump site, and a haul road leading to at least one of the load site and the dump site at the mine, and the prohibited area including the position of the first antenna is continued to be set during the operation of the mining machine.
 6. The management system of a mining machine according to claim 1, wherein the prohibited area is one area including both the position of the first antenna and the position of the second antenna.
 7. The management system of a mining machine according to claim 6, wherein the processing device is configured to change a size of the prohibited area based on a relative position between the first antenna and the second antenna.
 8. The management system of a mining machine according to claim 1, wherein the prohibited area includes a first prohibited area including the position of the first antenna, and a second prohibited area that is set away from the first prohibited area and includes the position of the second antenna.
 9. The management system of a mining machine according to claim 1, further comprising a communication system configured to transmit an instruction signal to the mining machine to prevent the mining machine from entering the prohibited area.
 10. The management system of a mining machine according to claim 9, wherein the communication system includes a first communication device, mounted in the vehicle, configured to allow a transmission of information based on signals respectively from the first and second antennas.
 11. The management system of a mining machine according to claim 10, wherein the information based on the signals include information on the position of the first antenna detected by the first detection device, and information on the position of the second antenna detected by the second detection device.
 12. The management system of a mining machine according to claim 11, further comprising a control facility including the processing device, wherein the processing device of the control facility is configured to set the prohibited area based on the information based on the signals from the first communication device, the communication system includes a second communication device placed in the control facility and a third communication device placed in the mining machine, and the instruction signal is transmitted from the second communication device to the third communication device.
 13. A management system of a mining machine, including a central control apparatus placed in a control facility, the management system comprising: a vehicle able to run at a mine; a first antenna, placed in the vehicle, configured to receive radio waves from GPS satellites; a portable second antenna, mounted in a releasable manner in the vehicle, configured to receive radio waves from the GPS satellites in a state of being carried by a worker manning the vehicle outside the vehicle; a first detection device, placed in the vehicle, configured to detect a position of the first antenna based on a signal from the first antenna; a second detection device, placed in the vehicle, configured to detect a position of the second antenna based on a signal from the second antenna; a processing device, provided in the central control apparatus, configured to set a prohibited area where an entry of a mining machine able to run at the mine is prohibited based on a detection result of the first detection device and a detection result of the second detection device, such that the prohibited area includes the position of the first antenna and the position of the second antenna, and set a travel condition of the mining machine to stop a travel of the mining machine before the prohibited area; and a communication system configured to transmit to the mining machine information on the travel condition set by the processing device, wherein the mining machine is configured to run at the mine in accordance with the information on the travel condition transmitted from the central control apparatus by the communication system.
 14. A management method of a mining machine comprising: receiving radio waves from GPS satellites with a first antenna placed in a vehicle able to run at a mine; receiving radio waves from the GPS satellites with a portable second antenna mounted in a releasable manner in the vehicle; detecting a position of the first antenna based on a signal from the first antenna; detecting a position of the second antenna based on a signal from the second antenna; and setting a prohibited area where an entry of a mining machine able to run at the mine is prohibited based on results of the detection, such that the prohibited area includes the position of the first antenna and the position of the second antenna.
 15. (canceled) 